Rare Earth Stearates as Thermal Stabilizers for Rigid Poly(vinyl chloride)  

作　　者：郑玉婴 蔡伟龙 傅明连 王灿耀 张星 

机构地区：[1]College of Chemistry and Chemical Engineering, Fuzhou University, Fuzhou 350002, China

出　　处：《Journal of Rare Earths》2005年第2期172-177,共6页稀土学报（英文版）

基　　金：ProjectsupportedbythePlanningCommissionofFujianProvince,CountInvestmentinFujian[2002]161andtheScienceand TechnologyFundofThreeProjectsofFujianProvince(K2002009)

摘　　要：A series of stearates with different rare-earth ion were investigated as thermal stabilizers for rigid PVC at 180 ℃ in air. Their stabilizing efficiency was based on measuring the rate of dehydrochlorination. The resulted revealed the higher stabilizing efficiency of the investigated rare-earth stearates as thermal stabilizers for rigid PVC compared with the thermal stabilizers for industry: calcium stearate, zinc stearate, butyl stannum mercaptide, phosphite esters, β-diketone and epoxidized sunflower oil. This was well illustrated by longer incubation period (T_S) values and lower rate of dehydrochlorination. The stable efficiency was affected by the nature of rare-earth element's individual electronic shell. The mechanism for the stabilizing effect of rare-earth stearates was proposed. The result was experimentally proved based on IR spectrum.A series of stearates with different rare-earth ion were investigated as thermal stabilizers for rigid PVC at 180 ℃ in air. Their stabilizing efficiency was based on measuring the rate of dehydrochlorination. The resulted revealed the higher stabilizing efficiency of the investigated rare-earth stearates as thermal stabilizers for rigid PVC compared with the thermal stabilizers for industry: calcium stearate, zinc stearate, butyl stannum mercaptide, phosphite esters, β-diketone and epoxidized sunflower oil. This was well illustrated by longer incubation period (T_S) values and lower rate of dehydrochlorination. The stable efficiency was affected by the nature of rare-earth element's individual electronic shell. The mechanism for the stabilizing effect of rare-earth stearates was proposed. The result was experimentally proved based on IR spectrum.

关 键 词：poly(vinyl chloride) thermal dehydrochlorination rare-earth stearates stabilization mechanism conductivity method congo red test 

分 类 号：O614.33[理学—无机化学]